Long-Term Debt - Additional Information (Detail) (USD $)	9 Months Ended		9 Months Ended		12 Months Ended				9 Months Ended		9 Months Ended				9 Months Ended
	Sep. 30, 2013	Nov. 01, 2013 Subsequent Event	Sep. 30, 2013 US commitment and borrowing base	Sep. 30, 2013 6.75% unsecured notes due 2019	Dec. 31, 2012 6.75% unsecured notes due 2019	Sep. 30, 2012 6.75% unsecured notes due 2019	Mar. 20, 2012 6.75% unsecured notes due 2019	Feb. 11, 2011 6.75% unsecured notes due 2019	Sep. 30, 2013 Dutch Senior Secured Revolving Credit Facility	Mar. 31, 2013 Dutch Senior Secured Revolving Credit Facility	Sep. 30, 2013 Revolving Credit Facility Minimum	Sep. 30, 2013 U.S. borrowing base	Nov. 01, 2013 U.S. borrowing base Subsequent Event	Mar. 31, 2013 US Senior Secured Credit Facility	Sep. 30, 2013 Senior Secured Credit Agreement	Sep. 30, 2013 Senior Secured Credit Agreement Minimum	Sep. 30, 2013 Senior Secured Credit Agreement Minimum LIBOR Rate Plus	Sep. 30, 2013 Senior Secured Credit Agreement Maximum	Sep. 30, 2013 Senior Secured Credit Agreement Maximum LIBOR Rate Plus	Sep. 30, 2013 Senior Secured Credit Agreement United States Revolving Credit Facility Federal Funds Rate Plus	Sep. 30, 2013 Senior Secured Credit Agreement United States Revolving Credit Facility LIBOR Rate Plus	Sep. 30, 2013 Senior Secured Credit Agreement Swingline Loans Federal Funds Rate Plus	Sep. 30, 2013 Senior Secured Credit Agreement Swingline Loans LIBOR Rate Plus
Debt Instrument [Line Items]
Credit facility, borrowing capacity	$ 31,250,000		$ 18,750,000							$ 100,000,000.0				$ 150,000,000.0
Additional revolving credit facility commitments	100,000,000								40,000,000
Percentage of revolving credit facility commitments											60.00%
Percentage added to basis																0.50%	1.50%	1.00%	2.00%	0.50%	1.00%	0.50%	1.00%
Commitment fee, annual rate															0.375%
Financial covenant term	The Senior Secured Credit Facilities contain a financial covenant that if either (a) excess availability is less than the greater of (i) 12.5% of the lesser of the commitments and the borrowing base and (ii) $31,250,000 or (b) U.S. availability is less than the greater of (i) 12.5% of the lesser of the U.S. commitments and U.S. borrowing base and (ii) $18,750,000, then following such event, Kraton and its restricted subsidiaries must maintain a fixed charge coverage ratio of at least 1.0 to 1.0.
Percentage of commitment and borrowing base	12.50%		12.50%
Fixed charge coverage ratio	1.00%
Borrowing base												187,300,000	196,400,000
Borrowing base drawn	0	0
Senior note face amount				$ 350,000,000			$ 100,000,000	$ 250,000,000
Debt instrument maturity date				Mar. 01, 2019
Debt instrument frequency of periodic payment					semi-annually
Debt instrument interest rate	6.75%			6.75%	6.75%	6.75%